| 摘要 |
<p>Raster image data is divided into a plurality of regions (A+AB, AB+B+BC, BC+C+CD, CD+D) having overlapped regions. The divided regions are compressed into divided compressed data (COMP(A+AB), COMP(AB+B+BC), COMP(BC+C+CD), COMP(CD+D)), which are stored in a memory (84). The divided compressed data (COMP(A+AB)) is decompressed to restore the raster image data. From the rast image data, mirror data (M(A) and M(AB)) are generated. By using all the mirror data (M(A)) and a part of the mirror data (M(AB)), frame data is generated. From the next divided compressed data (COMP(AB+B+BC)), frame data is generated. This procedure is repeated.</p> |
